00331nam a2200121Ia 4500082001700000100002000017245003900037260004300076300001000119490007000129500000500199700000500204  a513bD626.RV  aDlab, Vlastimil  aRepresentations of valued graphsb  aMontrealbUniversite de Montrealc1980  a190p.  aUniv. of Montreal, Seminaire de Mathematiques superieuresv v. 73  a  a